Which of the following is characteristic of cilia?
a. they are whiplike, motile cellular extensions that occur in large numbers on the exposed surfaces of certain cells.
b. they are used for cellular adhesion.
c. they are substantially longer than flagella, and are less common than flagella in humans.
d. they move substances in many directions across a cell's surfaces.

In the united states there are strict fishing seasons and limits, but not all countries enforce similar laws. in bangladesh there are few if any fishing restrictions. what might be the reason for less restrictions in smaller countries like bangladesh? a) the united states is the only country worried about overfishing. b) the united states wants to limit the supply of fish to increase the price. c) bangladesh and smaller countries have an unlimited supply of fish in their coastal waters. d) small countries, such as bangladesh, are practicing subsistence fishing, taking only the fish needed to survive.